Knee brace



FIG. 1 is a perspective view of a knee brace showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is another perspective view thereof;

FIG. 5 is another front view thereof, shown unfolded;

FIG. 6 is another rear view thereof, shown unfolded;

FIG. 7 is another front perspective view thereof, shown unfolded; and,

FIG. 8 is another rear perspective view thereof, shown unfolded. 

The ornamental design for a knee brace, as shown. 